Sound proofing a Q45

[rover3l]

Has anyone tried to reduce the NVH (Noise, Vibration, Harshness) characteristics on the Q. Mine is fairly quiet but I would be interested if there is anything that can be done to further reduce particulalry road noise. I see that Zeibart offer a sound proofing undercoating. Has anyone tried this

[HeavyDuty]

Hi,

Depending on how serious you are, there's a product called Dynamat Xtreme (dynamat.com)

It's a layer of pliable tar-like substance with a sheet of aluminum on top of it. It's self adhesive, once you remove the wax paper backing. You install it under your carpet & behind the trim panels wherever you wish.

I went a little overboard with my last vehicle, roof, floor, trunk, two layers in the doors, etc. It sounded like a vault when you closed the doors & accentuated the modest sound system like you wouldn't believe.

It's heavy & can get expensive, but if quiet's what you want, Dynamat delivers big time.

[rover3l]

After posting my question I found using SEARCH a 2 page thread on the whole issue of sound reduction. I guess my desire is to mainly reduce road noise and was thinking about the wheel wells as the starting point. On a recent visit to Zeibart to check out their undercoating prices I noticed that they offer a spray applied sound proofing material. I assume this is just a thick layer of something they would apply to the underside of the car.

I think to do this justice it would be necessary to temporarily remove the plastic wheel arch liners to apply the spray to the outside of the wheel wells

[AZhitman]

No need to remove 'em.

Put it on a lift, remove the wheels, mask the wells, and go at it.

I'd actually like to do this myself as well - Cut down on some of the noise from my big fat directional 255/50's.

[Jesda]

If the spray-on stuff youre talking about is SEAFOAM, I have not heard good things about it.

[AZhitman]

Seafoam is an engine treatment, Gulati.

[maxnix]

Seafoam is an engine treatment, Gulati.

Try http://www.soundcoat.com .

Spray on coatings are good for lowering resonant frequencies, but a more serious approach with decoupled isolated sound barriers is required for true sound energy attenuation.

[elwesso]

You might also try replacing the weather strips also..... Mine needs that, although I think its slighly quieter by putting on a rubber dressing.....

After riding in my Q (everyday) for the last few months, anything else I ride in seems VERY loud... I think my Q is loud, but is vault like when compared to anyother car......